| The elasticity polyurethane joint sealing material is one kind of joint sealing materials for concrete pavement joint which can use at normal temperature. It will solidify by chemic-reaction when commix the polyurethane preploymer, cross link agent, filling, plasticizer and catalyzer.Two-part elasticity polyurethane joint sealing material with super performance has been developed by serials experiments and the analysis of facts which influence on performance of the elasticity polyurethane joint sealing material. By mensurating it's performance and comparing with the joint sealing materials in commom use, it is showed that this material is completely up to the requirements of national standard, and adapt to the use of actual projects. At the same time, the paper also analyzed the mechanism of this material performance. At last, the paper studied the manufacture-technics and construction- technics.Beacause the polyurethane joint sealing material have high-elasticity, super-cohesiveness, excellent-low temperature performance, and moderate price, it has extensive development prospect. We hope the achievement of this study can promote the application of this material at the high-level concrete pavement joint projects. |
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